Valve.



J. FOSTER.

VALVE.

APPLICATION msn AuG.s0, 1913.

1,147,887. Patented. muy 2o, 1915.

Jonnros'rnn, on Monrnnnn, QUEBEC, CANADA..

VALVE..

To all 'Lu/mm t may concern Be it known that I, JOHN FOSTER, a snbject of! the King of Great Britain, residing at the city of Montreal, in the Province of' Quebec and Dominion of Canada, have invented certain new and useful Improvements in Valves, of which the 'following is a full, clear, and exact description.

This invention relates to improvements in high pressure valves, and is particularly designed for use in discharging pulp from digester tanks under heavy pressure.

The object of the invention is to provide means for taking up wear between the closure member and body of the valve, so that leakage past the valve when in either closed or open position is prevented.

A further object is to provide a valve of extremely strong and durable structure, which will not blow out.

In the drawings which illustrate the inventionz-Figure 1 is a vertical sectional View on the line 1 1, Fig. 2. Fig. 2 is a horizontal sectional view on the line 2 2, Fig. 1.

Referring more particularly to the'drawings, 3 designates the body of the valve having inlet and outlet passages 4 and 5 respectively. The body 3 is of substantially cylindrical form, as clearly shown, and the inlet and outlet passages are arranged diametrically opposite near the bottom of the body. The bottom of the body is closed by a cap 6 and thetop by a cap or bonnet 7 having a neck 8, to which a stuffing gland or the like may be attached. The bonnet is internally threaded to coperate with the threaded spindle 9, which is provided at its lower end with a shoulder 10 engaging the valve closure member, which is generally designated bythe numeral 11, so that this closure member will rise and fall with the spindle.

The closure member comprises a cylindri cal core 12 surroundedby concentric sleeves 13 and 14: respectively, each of which is split in a direction substantially parallel with the axis,these splits, designated 15,7being arranged on opposite sides 'of the axis, as clearly shown in Fig. 2. A plurality of grooves 16 are formed in the curved surface of the cylinder-parallel with the axis thereof and arranged equidistantly. These grooves taper slightly from top to bottom` and each contains a correspondingly tapered specication of Lttersratent. Patented July j230, 1915. Application lediAugnst 30, 191.3. Serial No. 787,516.

wedge -17 slightly, shorterwthanthe groove. The sleeves and wedges are keptin placey on` the core 12 by bottom and top vplates 18 and y ..19 respectively, which are secured to the lcore by cap screws 20. Each of the wedges 17 is provided with an adjusting screw 21 operating through theytop plate 19, and having a lock nut 22. The lower end of the screws 21 engaging thewedges may be connected` thereto by any suitable means, such as a pin 23 of reduced diameter entering the wedge. This pin may be provided with `a groove 24C engaged by a small key 25 mounted in the wedge. The upper plate 19 is also provided with one or more radially projecting pins 26 engaging in vertical grooves 27 formed in the inner surface of the body. These pins obviously operate to hold the closure member against rotation in the body.

The operation of the device will be readily understood from the drawings. When the valve is closed, as shown, kthe closure member occupies the lower part of the casing. When 'the spindle is rotated, the threads thereof cause it to rise and draw with it the closure member. It there should be any leakage between the closure member and body, the bonnet 7 is removed and each of the screws 21 turned a sulicient amount. This forces the wedges downwardly in the tapered slots and expands the inner sleeve 13vvhich in'turn expands the outer sleeve 14C into closer engagement with the body. Vhen the 'desired adjustment has been obtained, the adjusting screws 21 are locked by means of the nuts 22. When the screws 21 are turned inthe reverse direction, the connection between them and the wedges causes the latter to be drawn upwardly, thus relax- .95

ing the sleeves which contract. l

Having thusdes'cribed my invention, what l 'claim `is 1. In a valve, a casing, a cylindrical body slidable therein having tapering grooves parallelwith the body axis, concentric ysplit sleeves surrounding said body, members slidable in said grooves, and vadjusting means in the body revolubly connected-with said members and adapted to move thesame longitudinally in the grooves.

2. In a valve, a casing, a cylindrical body slidable therein having tapering grooves parallel'with the body axis, concentric split sleeves surrounding said body, wedges slidable in the body grooves, and adjusting screws in the body revolubly connected With said Wedges and adapted to move the same longitudinally in the body grooves.

3. ln a valve, a grooved casing having a iiuid passage therethrough, a closure member Controlling flow through said passage comprising a cylindrical body, split sleeves surrounding said body formed concentric therewith, tapering channels in said body formed parallel With the aXis thereof, Wedges in said channels adapted to expand said sleeves, adjusting screws operating in the body to move said Wedges in axial direetion, means for locking said screws, and means for holding the closure member 15 against revolution in the casing.

In Witness whereof, I have hereunto set my hand in the presence of tWo Witnesses.

JOHN FOSTER. l/Vitnesses:

C. W. TAYLOR, Gr. M. MORELAND.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

